Methods for increasing the azimuth resolution and mapping rate of a synthetic aperture sonar

Abstract

It has been shown that the synthetic aperture technique can be used to improve the resolution of side looking sonar systems. However, since mapping rate is inversely proportional to resolution, this improved resolution results in a decreased mapping rate.Ideally, we would l i e to increase the resolution without a proportional decrease in mapping rate, and so this paper will draw together techniques for increasing the mapping rate top resolution ratio.There have been many techniques previously suggested in the literature for improving either mapping rate or resolution, and these will be discussed in this paper. Those techniques most applicable to the ACID sonar will be investigated and the results compared with those from other investigators.

Unified framework for modern synthetic aperture imaging algorithms

“…In this this article. There are currently at least five operating underwater SAS systems: the extensive European ACID project [42][43][44][45][46][47], mode, the along-track dimension of the image becomes limited by the beamwidth of the physical aperture, but the along-track one based at the U.C. Santa Barbara [48], a French Navy/U.S.…”